[Boatanchors] RME 6900 users?

[w7fe]

Hi Glen,

Well, I must have more work to do.  Mine overloads easily and produces 
distorted audio on strong signals.  Now, there's no AGC provided to the RF 
Amplifier in this circuit (correct?), but do you find it necessary to "ride" 
the RF gain on SSB to avoid audio distortion?

All the electrolytics were been replaced (nicely) by the guy I bought it 
from. That's as far as he went, however, except for doing a very nice 
repaint of the cabinet (although the cabinet has been "sprung" such that it 
doesn't sit level--I'm still mentally designing the fixture necessary to 
straighten it) and spraying the knobs with some kind of a lacquer which 
attached the bakelite, leaving a very rough finish.  I'm looking for a new 
set of knobs, by the way....

I have disassembled and repaired the mashed 57KC IF coils which sit at the 
rear of the IF "doghouse" (someone apparently let it rest on the slug screws 
while working on the underside and put enough pressure on it to mash the 
coils down into the cans, crushing the micarta tubes...no damage to the 
slugs or windings, though, and "Goop" came to the rescue to repair and 
straighten up the tubes).

I reassembled and properly set the mechanical dial stops, tightened the 
loose tuning shaft couplers and slightly end-loaded the shaft to correct the 
majority of the backlash, and did a full IF and RF alignment including 
calibration of each band to well within the dial adjustment range (rather 
time-consuming).

I have not yet done all of the resistance checks or done any poking around 
with the scope...I guess that's next.  Based on your comments, I think it 
can be made to sound better than it does.

Stu


----- Original Message ----- 
From: "Glen Zook" <gzook at YAHOO.COM>
To: <BOATANCHORS at LISTSERV.TEMPE.GOV>
Sent: Thursday, January 05, 2006 7:39 PM
Subject: Re: [Boatanchors] RME 6900 users?


>I have had one for going on 3 years.  Frankly, it has
> the best sounding audio on SSB of any receiver that I
> own (and I have a "fair" number of receivers).
>
> Glen, K9STH
>
>
> --- w7fe <w7fe at cox.net> wrote:
>
> Anybody out there have a good-working RME 6900?  I'd
> like to compare notes with you on restoration and
> performance.
>
>
>
>
>
>
>
> Glen, K9STH
>
> Web sites
>
> http://home.comcast.net/~k9sth
> http://home.comcast.net/~zcomco
>
>
>
> __________________________________________
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